GENERAL AIRSTAGE TECHNICAL REFERENCE ASTG09KMTC / ASTG12KMTC with AOTG09KMTC / AOTG12KMTC Specifications, dimensions, refrigerant circuit, electrical checks, diagnostics, R32 precautions, parts and accessories |
Applicable combinations
Indoor: ASTG09KMTC / ASTG12KMTC
Outdoor: AOTG09KMTC / AOTG12KMTC
Refrigerant: R32
Power supply: 240 V, 50 Hz, supplied to outdoor unit |
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Quick navigation Specifications Dimensions Refrigerant Electrical Resistance Checks Diagnostics R32 Safety Indoor Parts Outdoor Parts Accessories |
1. Key specifications |
| Item | ASTG09KMTC | ASTG12KMTC | | Available voltage range | 198–264 V | | Star rating index | 5.0 | 3.5 | | Cooling capacity - Rated | 2.5 kW | 3.5 kW | | Cooling capacity - Min–Max | 0.9–3.6 kW | 0.9–4.1 kW | | Heating capacity - Rated | 3.2 kW | 4.1 kW | | Heating capacity - Min–Max | 0.9–5.3 kW | 0.9–6.1 kW | | Input power - Cooling | 0.53 kW | 0.89 kW | | Input power - Heating | 0.66 kW | 0.79 kW | | Current - Cooling | 3.0 A | 4.2 A | | Current - Heating | 3.5 A | 4.0 A | | EER - Cooling | 4.71 | 3.93 | | COP - Heating | 4.84 | 4.68 | | Maximum operating current - Cooling | 6.0 A | 6.5 A | | Maximum operating current - Heating | 7.5 A | 9.0 A |
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Outdoor unit summary |
| Item | AOTG09KMTC | AOTG12KMTC | | Refrigerant charge | 850 g | 850 g | | Pre-charge pipe length | 15 m | 15 m | | Maximum pipe length | 20 m | 20 m | | Maximum height difference | 15 m | 15 m | | Operating range - Cooling | -10 to 46°C | -10 to 46°C | | Operating range - Heating | -15 to 24°C | -15 to 24°C | | Sound pressure - Cool / Heat | 46 / 46 dB(A) | 49 / 49 dB(A) |
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2. Dimensions and weights |
| Unit | Net dimensions | Gross dimensions | Weight | | Indoor | 270 × 834 × 222 mm | 277 × 914 × 332 mm | 10 kg net / 13 kg gross | | Outdoor | 542 × 799 × 290 mm | 602 × 940 × 375 mm | 32 kg net / 35 kg gross |
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3. Refrigerant circuit and sensors |
Major refrigerant components
Compressor, outdoor heat exchanger, expansion valve and coil, 2-way valve, 3-way valve and 4-way valve. |
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| Sensor reference | Function | | ThD | Discharge temperature | | ThO | Outdoor temperature | | ThHO | Outdoor heat exchanger outlet temperature | | ThHM | Outdoor heat exchanger middle temperature | | ThR | Room temperature | | ThPI | Indoor pipe temperature |
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4. Electrical and PCB references |
| Location | Model | Identifier | | Indoor control unit | ASTG09KMTC | EZ-01836HSE | | Indoor control unit | ASTG12KMTC | EZ-01837HSE | | Indoor main PCB | ASTG09KMTC | K18RA-1806HSE-C1 | | Indoor main PCB | ASTG12KMTC | K18RA-1807HSE-C1 | | Communication PCB | Both | K14YM-1500HSE-CA0 | | Outdoor inverter assembly | AOTG09KMTC | EZ-018FHUE | | Outdoor inverter assembly | AOTG12KMTC | EZ-0187HUE | | Outdoor main PCB | AOTG09KMTC | K17LG-1803HUE-C1 | | Outdoor main PCB | AOTG12KMTC | K17LG-1800HUE-C1 |
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5. Field electrical checks |
| Component | Test points | Reference resistance | Reference temperature | | Compressor winding | U–V | 1.975 Ω | 25°C | | Compressor winding | V–W | 1.975 Ω | 25°C | | Compressor winding | U–W | 1.975 Ω | 25°C | | Expansion valve coil | Red–Blue | 46.0 Ω | 20°C | | Expansion valve coil | Red–Orange | 46.0 Ω | 20°C | | Expansion valve coil | Red–Yellow | 46.0 Ω | 20°C | | Expansion valve coil | Red–White | 46.0 Ω | 20°C |
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| Measurement note: Isolate power, disconnect the component from the circuit and allow temperatures to stabilise before measuring. Compare all compressor windings with each other; significant imbalance is as important as the absolute value. |
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6. Error detection and diagnostics |
| For wireless-remote installations, the indoor operation, timer and economy lamps flash in coded patterns. Count each flash group carefully and allow the sequence to repeat before recording the fault. |
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| Operation lamp | Timer lamp | Economy lamp | Fault description | | 6 | 3 | — | Inverter error | | 6 | 4 | — | Active filter / PFC circuit error | | 6 | 8 | — | Rush-current limiting resistor temperature rise error | | 7 | 1 | — | Discharge temperature sensor error | | 7 | 2 | — | Compressor temperature sensor error | | 7 | 8 | — | Pressure sensor error | | 7 | 9 | — | High-pressure switch error | | 8 | 1 | — | Outdoor fan motor 1 error | | 8 | 3 | — | 4-way valve error | | 8 | 4 | — | Expansion valve coil error | | 9 | 1 | — | Serial communication error | | 9 | 4 | — | Indoor unit power-supply interruption error | | 10 | 4 | — | High-pressure error | | 10 | 5 | — | Low-pressure error |
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7. R32 service precautions |
| Flammable refrigerant: Work on the refrigerant circuit must be undertaken by appropriately licensed personnel using procedures and equipment suitable for R32. |
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| Before opening the refrigerant circuit | | ↓ | | Confirm valid refrigerant-handling certification and R32 competence | | ↓ | | Remove ignition sources and assess the work area | | ↓ | | Ventilate the area and avoid confined-space work where practicable | | ↓ | | Check the area with a detector suitable for flammable refrigerants | | ↓ | | Continue monitoring during refrigerant work |
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8. Indoor-unit parts |
| Item | Part number | Part name | | 1 | 9387480009 | Bracket panel | | 2 | 9387471007 | Louver spring | | 3 | 9333704005 | Grille clamper R | | 4 | 9333608006 | Bush | | 5 | 9387714036 | Step motor holder assy | | 6 | 9901011047 | Step motor | | 7 | 9332861006 | Shaft cover | | 8 | 9387590050 | Drain pan total assy | | 9 | 9387476002 | Screw cap | | 10 | 9387479003 | U/D louver assy | | 11 | 9387478020 | Under cover R | | 12 | 9387756050 | Intake grille assy | | 13 | 9387477023 | Under cover L | | 14 | 9387473001 | Air filter | | 15 | 9387597035 | Wire cover assy | | 16 | 9333719009 | Grille clamper L | | 17 | 9316177017 | Drain cap | | 18 | 9316904002 | Drain hose assy | | 19 | 9318912005 | Remote controller holder | | 20 | 9332438673 | Remote controller | | 50 | 9387587012 | Base assy | | 51 | 9383765032 | WLAN adapter holder assy | | 52 - 09 | 9711141071 | Main PCB - 09 model | | 52 - 12 | 9711141088 | Main PCB - 12 model | | 53 | 9387488012 | Cable guide | | 54 | 9711146038 | Display assy | | 55 | 9711147011 | Indicator PCB | | 56 | 9317755061 | Pyroelectric sensor | | 57 | 9382134006 | Front panel cover B assy | | 58 | 9387753028 | Display case assy | | 59 | 9306489045 | Terminal | | 60 | 9603631017 | Brushless motor | | 61 | 9387589009 | Motor case assy | | 62 | 9317250009 | Air clean filter assy | | 63 | 9332911008 | Electric filter holder | | 64 | 9387593150 | Evaporator total assy | | 65 | 9900627041 | Thermistor assy | | 66 | 9387467000 | Room thermistor holder | | 67 | 9333628004 | Bearing D assy | | 68 | 9387055016 | Crossflow fan assy | | — | 9709626054 | Wire with connector |
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9. Outdoor-unit parts |
| Item | Part number | Part name | | 1 | 9322556028 | Top panel assy | | 2 | 9322811011 | Protective net | | 3 | 9306488130 | Terminal | | 4 | 9900435028 | Terminal | | 5 - 09 | 9710924187 | Main PCB - 09 model | | 5 - 12 | 9710924156 | Main PCB - 12 model | | 6 | 9900727062 | Thermistor assy | | 7 | 9900565060 | Thermistor assy | | 8 | 9900583019 | Reactor assy | | 9 | 9322418005 | Heat sink | | 10 | 9322570055 | Switch cover assy | | 11 | 9322552204 | Cabinet right assy | | 12 | 9322144003 | Drain pipe | | 13 | 9322314024 | Base assy | | 14 | 9319151007 | Emblem | | 15 | 9322135001 | Blow grille | | 16 | 9322555014 | Front panel assy | | 17 | 9322136008 | Propeller fan | | 18 | 9603553005 | Brushless motor | | 19 | 9322553010 | Motor bracket assy | | 20 | 9322275011 | Condenser total assy | | 50 | 9322444004 | 4-way valve assy | | 51 | 9970195006 | Solenoid | | 52 | 9970173028 | Expansion valve coil | | 53 | 9322463029 | Pulse motor valve assy | | 54 | 9322474001 | 2-way valve assy | | 55 | 9322475008 | 3-way valve assy | | 56 | 9322427007 | Compressor assy | | — | 9322535009 | S-insulator B | | — | 9322536020 | S-insulator F | | — | 9322537003 | S-insulator H | | — | 9323045002 | S-insulator V |
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10. Accessories and optional parts |
| Category | Items | | Indoor standard accessories | Operating instructions, installation instructions, wall-hook bracket, remote controller, remote holder, batteries ×2, large tapping screws ×5, small tapping screws ×2, cloth tape, filter holders ×2 and air-cleaning filter | | Outdoor standard accessories | Installation instructions, cable tie and drain pipe |
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| Optional part | Model | Notes | | External connect kit | UTY-XWZXZ5 | Communication kit required | | External input/output PCB | UTY-XCSXZ2 | Interface PCB | | Communication kit | UTY-TWRXZ2 | Enables non-polar 2-core wired remote control | | Wireless LAN adapter | UTY-TFSXF3 | Mobile-device management support |
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| Service note: This article is a consolidated field reference. Confirm detailed connector pinouts, thermistor curves, complete error patterns and current replacement-part applicability against the relevant service manual, wiring diagram and parts system before completing repairs. |
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| GENERAL AIRSTAGE | ASTG09KMTC / ASTG12KMTC Service Reference |
